船舶設計原理課程大作業(yè)-螺旋槳設計

1、SHANGHAI JIAO TONG UNIVERSITY螺旋槳設計計算書姓名:王志強 學號：5130109174課程:船舶原理（2）專業(yè):船舶與海洋工程日期:2016年4月 一、 船舶的主要參數船型：單槳集裝箱船船型參數設計水線長LWL215m垂線間長LPP210m型寬B32m設計吃水T12.7m排水體積54000m3方型系數CB0.655槳軸距基線高度ZP4.7m轂徑dh1.4m螺旋槳材料Cu3鎳鋁青銅船體有效功率數據表航速/Kn有效功率PE/kW壓載滿載超滿載19761796481143619.581981037812308208950113201343620.5978612369146

2、892110668134751601421.51160514651174202212657159701899922.51392917563209072315574196232337423.51779422403267062420840262143127624.525010314293753125306483848145988主機參數主機最大持續(xù)功率Pmax33000KW額定轉速102r/min軸系效率s0.97推進因子伴流分數0.25推力減額分數t0.16相對旋轉效率R1.0船身效率H=1-t1-1.12二、 最大航速確定按滿載工況、主機功率Ps=0.85Pmax、螺旋槳轉速102r/min，

3、設計MAU型5葉右旋槳1只。螺旋槳敞水收到功率：PD=0.85SRPmax=0.85×0.97×1.0×33000kW=27208.5kW最大航速設計的步驟：假定若干個盤面比（ 0.5、0.55、0.6、0.65、0.7、0.75、0.8），對每一個盤面比進行以下計算：1）假定若干直徑（范圍7.5m 8.5m，每隔0.01米取一次值）；2）對每個直徑，假定若干航速（范圍21節(jié)25節(jié)，每隔0.001節(jié)取一次值）；3）對每個直徑與航速的組合，用回歸公式計算設計進速系數下不同螺距比（范圍0.41.6）螺旋槳的推力、扭矩，通過插值（或二分法）確定滿足設計功率要求（即：螺旋

4、槳要求的扭矩與設計功率與轉速下的收到轉矩平衡）的螺距及相應的有效推力與敞水效率；4）對每個直徑，根據阻力曲線及不同航速下的有效推力值，通過插值確定有效推力與阻力平衡的航速，以及對應的螺距和敞水效率；5）根據航速（或敞水效率）與直徑的關系，確定最大航速（或最高敞水效率）對應的直徑，該直徑即為所假定盤面比下的最佳直徑。由MATLAB編程得到各個盤面比最佳螺旋槳尺寸及最大航速，如下表所示：盤面比0.500.550.600.650.700.750.80航速V(kn)23.157623.188023.210123.213523.187823.122423.0054螺距P(m)7.10687.12287.

5、14967.19987.25587.31357.3804直徑D(m)7.787.847.887.887.857.797.69螺距比P/D0.913460.908520.907310.913680.924310.938830.95974進速系數J0.675560.671270.668500.668600.670410.673670.6789700.664350.669570.673440.674030.669530.658400.63956三、 空泡校核柏立爾空泡限界線圖空泡校核計算結果：P0=Pa+hs=10330+1025×(12.7-4.7)kgf/m2=18530kgf/m2=

6、181594N/m2盤面比0.500.550.600.650.700.750.80PO181594181594181594181594181594181594181594VA8.9349738.9466868.9552408.9565328.9466158.9213948.876232VA279.83373880.04318880.19633280.21947480.04192379.59126478.787492(0.7N60D)2845.9659859.0645867.8529867.8529861.2574848.1420826.5066V0.7R2925.7996939.1077948

7、.0492948.0723941.2994927.7333905.294112V0.7R2474893.6481720.0486306.6486318.4482844.2475885.4464375.20.7R0.382390.376970.373410.373410.376090.381590.39105c0.14650.14500.14400.14400.14480.14630.1492推力T(kN)2023.0482036.2722046.0972047.5922036.1672007.9831960.463需要投射面積AP29.0785229.1523229.2182129.23884

8、29.1231228.8412028.29573需要展開面積AE33.8982933.9395434.0052634.0871834.0488833.8508333.39836A047.5388948.2749748.7688348.7688348.3982047.6611846.44538需要的盤面比AE/ A00.71310.70300.69730.69900.70350.71020.7191做計算盤面比圖需要盤面比圖，如下所示：圖 1 計算盤面比需要盤面比圖由圖插值可知，不發(fā)生空泡的最小盤面比為：0.7040 作最大航速盤面比，敞水效率盤面比圖如下所示： 由圖可知，在盤面比大于0.704

9、0時，最大航速與敞水效率都隨盤面比的增大而單調遞減，因此，本螺旋槳設計選取盤面比為0.7040，將該盤面比輸入之前計算最大航速的程序中可以得到對應的最佳螺旋槳要素。AE/A0=0.7040 P/D=0.9243 D=7.85m 0=0.6689 Vmax=23.1841kn P=7.2568m四、 強度校核按2001年規(guī)范校核t0.25R及t0.6R，（見強度計算表）應不小于按下式計算之值：t=YX-Y Y=1.36A1NeZbne X=A2GAdN2D31010Zb計算功率：Ne=33000×0.97kW=32010kWAd=AE/A0=0.7040 P/D=0.9243 =10o

10、 G=7.6g/cm3 N=ne=102r/minb0.66R=0.226DAd0.1Z=0.226×7.85×0.7040/0.5m=2.4979m強度計算表：項目單位0.25R0.6R槳葉寬度bm1.80152.4757Pm7.25687.2568D/P1.08191.0819K1634207K2250151K31410635K4434A11914.7766700.2132Y90727.355324142.747K58223K63412K74165K8380330A21246.56181134.7117X0.37270.2468K1.381.38tmm300.11641

11、45.9621tnmm300.2625171.13校核結果符合規(guī)范符合規(guī)范注：表中025R中的實際槳葉厚度由下表中02R和03R中的槳葉厚度插值得到 由上表可知，tn>t，即采用MAU標準槳葉厚度符合規(guī)范中的強度要求，且有一定的裕度。螺旋槳各半徑處槳葉厚度：r/R0.20.30.40.50.60.660.70.80.900.951.0t/mm318.71281.815244.92208.025171.13149.15134.23597.3460.44542.3923.55五、 螺距修正設計螺旋槳采用MAU型5葉槳的厚度分布，因此無需進行厚度差異的螺距修正。設計螺旋槳的轂徑比為(dhD)&

12、#39;=1.47.85=0.1783,MAU槳標準轂徑比為dhD=0.180，需要進行修正。(dhD)B=110dhD'-dhD=0.1×0.1783-0.180=-1.656×10-4修正后的螺距比為：(PD)m=PD+(dhD)B=0.9241六、 重量及慣性矩計算由于未能找到MAU槳切面有關的數據，此時采用按統(tǒng)計資料得出的近似公式進行計算，按照我國船舶及海洋工程設計研究院提出的公式計算如下。槳葉重：Gb1=0.169Zbmax0.5t0.2+t0.61-dDD(kgf) =0.169×7600×5×2.4979×（0.

13、5×0.3187+0.17113）×（7.85-1.4)kg =33822.93kg槳轂重：Gn=(0.88-0.6d0d)LKd2(kgf) =0.88-0.6×0.74041.4×1.875×7600×1.42kg=15715.812kg其中：d0=0.045+0.108(PD/N)1/3-KLK2m =0.045+0.108×(27208.5×1000/735102)1/3-0.08×1.8752m=0.7404m螺旋槳重量：G=Gb1+Gn=33822.93+15715.812=49538.742

14、kg螺旋槳慣性矩：當dD=0.1783<0.18時： Imp=0.0948Zbmax(0.5t0.2+t0.6)D3(kgfcms2) =0.0948×7600×5×2.4979×(0.5×318.71+171.13)×7.853kgcms2 =1438559.087kgcms2七、 敞水特性曲線由MAU型五葉槳敞水特性曲線回歸公式及系數表，可以在MATLAB中得到盤面比為0.7040，螺距比為P/D=0.9243的敞水特性曲線如下所示：設計螺旋槳敞水特性數據表J00.10.20.30.40.50.60.70.80.91.0 1

15、.0148KT0.4458 0.4156 0.3816 0.3443 0.3038 0.2605 0.2147 0.1665 0.1160 0.0633 0.0085 0.0000 KQ0.0604 0.0568 0.0528 0.0484 0.0436 0.0385 0.0330 0.0271 0.0208 0.0139 0.0065 0.0053 00.0000 0.1165 0.2302 0.3399 0.4437 0.5390 0.6218 0.6847 0.7115 0.6517 0.2079 0.0000 八、 系柱特性計算由敞水性能數據表得，當J=0時，KT=0.4458，KQ=

16、0.0604計算功率：PD=0.97×33000kW=32010kW 系柱推力減額分數?。簍0=0.04，主機轉矩：Q=PD×602N=32010×602×102kNm=2996.794kNm系柱推力：T=KTKQQD=0.44580.0604×2996.7947.85kN=2817.672kN螺旋槳轉速：N=60TD4KT=60×2817.672×10001025.91×7.854×0.4458r/min=76.42r/min九、 航行特性計算取轉速為102r/min，97r/min,92r/min進行

17、計算，結果如下表所示：項目單位數值Vkn19202122232425VAm/s7.3308337.7166678.1025008.4883338.8741679.2600009.645833N=102r/minJ0.5493320.5782440.6071560.6360680.6649810.6938930.722805KT0.238220.224870.211320.197560.183620.169480.15515KQ0.0358020.0342000.0325650.0308960.0291940.0274560.025682PTEkW22021.3621881.1321590.30

18、21146.3120546.6619788.8518870.41PSkW34843.6033283.7831692.5830069.1228412.3626721.1824994.30N=97r/minJ0.5776480.6080500.6384530.6688550.6992580.7296610.760063KT0.225150.210900.196420.181730.166830.151720.13640KQ0.0342330.0325130.0307570.0289630.0271300.0252560.023339PTEkW18822.2618558.5318149.071759

19、1.3816882.9716021.3815004.12PSkW28653.0527213.8825743.9924242.3622707.8321139.1119534.78N=92r/minJ0.6090420.6410970.6731510.7052060.7372610.7693160.801371KT0.210430.195150.179640.163890.147910.131700.11527KQ0.0324570.0306030.0287070.0267660.0247810.0227470.020663PTEkW15824.6215448.3714931.3214270.99

20、13464.9112510.6111405.62PSkW23178.2721854.3220500.1819114.6717696.4816244.1614756.10將上述計算結果繪制成下面兩幅航行特性曲線圖：從航行特性曲線圖可以得到：（1）壓載航行時可達最大航速為V=23.8605kn，主機馬力約為26875kW。（2）超滿載時可達最大航速為V=22.4842kn，主機馬力約為29186kW。（3）滿載航行，N=102r/min時，可達最大航速為V=23.1750kn，主機馬力約為28034.3kW，與設計要求基本一致。十、 螺旋槳計算總結螺旋槳直徑7.85螺距比P/D=0.9241型式M

21、AU葉數Z=5盤面比0.7040縱傾角10o螺旋槳效率0=0.6689 設計航速Vmax=23.1841kn轂徑比0.1783旋向右旋材料Cu3鎳鋁青銅重量49538.742kg慣性矩1438559.087kgcms2MAU螺旋槳槳葉輪廓尺寸表r/R0.20.30.40.50.60.660.70.80.90.951r / mm785.001177.501570.001962.502355.002590.502747.503140.003532.503728.753925.00從母線到葉片隨邊距離 / mm698.41835.55968.191087.591197.991242.461282.1

22、71308.651211.231050.87431.89從母線到葉片導邊距離 / mm963.691105.321206.991268.931277.681255.441206.741012.40627.72338.47葉片寬度 / mm1662.101940.872175.172356.522475.672497.902488.912321.051838.951389.33葉片厚度 / mm318.71281.82244.92208.03171.13149.15134.2497.3460.4542.3923.55從導邊至最厚點的距離 / mm531.87621.08696.05765.878

23、64.01946.701000.541056.08899.25694.67MAU型葉切面尺寸表r/R 0.2X0.0033.2466.4899.73166.21249.32332.42498.63531.87664.84831.05997.261163.471329.681495.891579.00Yu111.55165.25190.43210.83242.38271.70293.85318.07318.71311.54286.68249.07201.27144.2280.6347.81Yo77.2960.7147.8131.8717.217.490.3X0.0038.8277.63116.4

24、5194.09291.13388.17582.26621.08776.35970.431164.521358.611552.691746.781843.82Yu98.64146.12168.38186.42214.32240.25259.83281.25281.82275.47253.49220.24177.97127.5271.3042.27Yo68.3453.6942.2728.1815.226.620.4X0.0043.5087.01130.51217.52326.28435.03652.55696.05870.071087.591305.101522.621740.141957.652

25、066.41Yu85.72126.99146.34162.01186.26208.79225.82244.43244.92239.41220.31191.40154.67110.8361.9636.74Yo59.3946.6636.7424.4913.235.760.5X0.0047.8495.67143.51239.42358.90478.61718.03765.87952.981186.981420.751654.751888.752122.522239.64Yu72.81107.86124.29137.61158.20177.34191.80207.61208.03203.34187.12162.57131.3794.1352.6331.20Yo50.4539.6331.2020.8011.234.890.6X0.0053.97107.94161.91270.10405.02539.94810.04864.011053.641290.571528.971764.662001.582238.752357.08Yu58.1884.8899.26110.81128.69145.12157.10170.79171.13167.28153.93133.74108.0777.4443.3025.67Y